cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A281049 Number of n X n 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

Table of values

n a(n)
1 0
2 1
3 68
4 1022
5 7803
6 46610
7 221212
8 926077
9 3549039
10 12749511
11 43675963
12 144504080
13 466130380

List of values

[0, 1, 68, 1022, 7803, 46610, 221212, 926077, 3549039, 12749511, 43675963, 144504080, 466130380]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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